ADMP621

Data Sheet

TIMING CHARACTERISTICS

Table 2.

Parameter

Description

Min

Typ

Max

Unit

SLEEP MODE

Sleep Time

Time from CLK falling < 1 kHz

1

ms

Wake-Up Time

Time from CLK rising > 1 kHz to output within 3 dB of final sensitivity, power on

25

ms

INPUT

Input clock period

270

1000

ns

Clock Frequency (CLK)

1.0

3.0721

3.6

MHz

Clock Duty Ratio

40

60

%

OUTPUT

DATA1 (right) driven after falling clock edge

31

ns

DATA1 (right) disabled after rising clock edge

5

23

ns

DATA2 (left) driven after rising clock edge

31

ns

DATA2 (left) disabled after falling clock edge

5

26

ns

1

The microphone operates at any clock frequency between 1.0 MHz and 3.6 MHz. Some specifications may not be guaranteed at frequencies other than 3.072 MHz.

Timing Diagram

CLK

DATA2

DATA1

Figure 3. Pulse Density Modulated Output Timing

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